Investment Securities - Portfolio of Available-for-Sale Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Amortized Cost	$ 311,164	$ 317,375
Gross Unrealized Gains	5,373	3,389
Gross Unrealized Losses	392	2,605
Fair Value	316,145	318,159
Obligations of state and political subdivisions
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Amortized Cost	31,104	30,750
Gross Unrealized Gains	446	770
Gross Unrealized Losses	29	27
Fair Value	31,521	31,493
GSE mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Amortized Cost	65,916	84,946
Gross Unrealized Gains	3,229	2,321
Gross Unrealized Losses	0	229
Fair Value	69,145	87,038
Collateralized mortgage obligations: residential
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Amortized Cost	195,047	194,067
Gross Unrealized Gains	1,289	297
Gross Unrealized Losses	331	2,276
Fair Value	196,005	192,088
Collateralized mortgage obligations: commercial
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Amortized Cost	3,497	5,512
Gross Unrealized Gains	0	1
Gross Unrealized Losses	32	65
Fair Value	3,465	5,448
Mutual funds
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Amortized Cost	2,100	2,100
Gross Unrealized Gains	25	0
Gross Unrealized Losses	0	8
Fair Value	2,125	$ 2,092
Corporate debt securities
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Amortized Cost	13,500
Gross Unrealized Gains	384
Gross Unrealized Losses	0
Fair Value	$ 13,884

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=65884222&loc=d3e22054-111558

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27232-111563

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=66010992&loc=d3e26610-111562

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Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27161-111563

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Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
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-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27161-111563

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.2)
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